Postulate 5
Through any two distinct points there exists exactly one line.
Postulate 6
A line contains at least two points.
Postulate 7
Through any three noncollinear points there exists exactly one plane.
Postulate 8
A plane contains at least three noncollinear points.
Postulate 9
If two distinct points lie in a plane, then the line containing them lies in the plane.
Postulate 10
If two distinct planes intersect, then their intersection is a line.